Wound magnetic strip elements - with corrugations on outside of straight strip straightened by bending on edge

Stators and rotors of electrical machines can be wound from magnetic strip in a way which ensures a continuous flush contact of all turns on the inside but an interrupted contact on the outside. In the case of a stator, e. g the magnetic strip has slots (5) punched out along one side. On the other side, corrugations (2) of trapezoidal shape are pressed in from the edge (3) to the bottom of the slots (6). When the strip is wound to a coil, the corrugations straighten out but leave intermittent thinner strip sections on the outside of the wound coil. The inside heads (4) of the teeth, however, form a continuous flush contact with those of the next turn. Instead of trapezoidal, the corrugations can have a conical or pyramidal shape.